摘要
呋喃是在食品加热过程中形成的潜在致癌物质。本实验以呋喃为模板,2-甲基呋喃为模拟模板,α-甲基丙烯酸(MAA)为功能单体,甲基丙烯酸乙二醇酯(EGDMA)为交联剂,采用非共价法合成分子印迹聚合物(MIP)。优化制备过程,并研究聚合物的吸附动力学、等温吸附及吸附识别性能。结果表明,MIP以2-甲基呋喃作为模拟模板,模板单体配比为1∶4时对呋喃的印迹效果最佳,最大吸收量QMIP=69.64mg/g,印迹因子α=1.879。此聚合物对2-甲基呋喃与呋喃具有相似吸附特性,α=Q2-甲基呋喃/Q呋喃=1.004。固相萃取实验表明,此MIP对速溶咖啡样品中的呋喃具有显著的特异性吸附作用,可以固相萃取食品饮料中痕量呋喃。
As a kind of potential carcinogenic materials,furan is formed during the heat treatment and widely exists in the commercial food.In this experiment,furan was chosen as the template,2-methyl furan as dummy template,methacrylicacid（MAA）as function monomers,and ethyleneglycol dimethacrylate（EGDMA）as cross linkers.The molecularly imprinted polymer（MIP）was synthesized by non-covalent method.In this study,the preparation of MIP was optimized,and the kinetics of adsorption,static equilibrium binding and recognition properties of the polymers to furan and 2-methyl furan were also investigated.The results showed that the best imprinting effect（Q MIP =69.64 mg/g,imprinted factorα=1.879）was observed when 2-methyl furan was chosen as dummy template and template monomer ratio was 1∶4.The MIP had the similar absorbability to furan and 2-methyl furan（α=Q 2-methyl furan /Qfuran=1.004）.The results also showed that MIP had specific adsorption for furan in the instant coffee.Thus,it could be used as a solid phase extractant to extract the furan in food and drinks by using solid phase extraction.
出处
《分析化学》
SCIE
EI
CAS
CSCD
北大核心
2010年第4期559-563,共5页
Chinese Journal of Analytical Chemistry
基金
国家自然科学基金(No.30871751)资助项目
